Dynamo-armature



(No Model.) 2 Sheets-Sheet 1. E. N. BLISS.

DYNAMO ARMATURE. No. 374,728. Y Patented Dec. 13, 1887.

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BY Q r ATT YS- N. FETERS. Fhomumo n lmr, Washinginn. D4 0 (Nc J ModeL) 2 Sheets-Sheet 2.

E. N. BLISS. DYNAMU ARMATURE.

No. 374,728. v Patented Dec. 13, 1887.

BY WATTYS:

N. PETERS. E bow-Lithogra h". Wnshin lon, D. c.

UNITED STATES PATENT OFFICE.

EDWARD N. BLISS, OF NEWARK, NEW JERSEY.

DYNAMO-ARMATURE.

SPECIFICATION forming part of Letters Patent No. 374,728, dated December 13, 1887.

Application filed December 20, 1886. Serial No. 122,042. (No model.)

' such as will enable others skilled in the art to which it appertains to make and use the same, reference beingliad to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The object of this invention is to enable the driving-shaft of the armature of a dynamoelectric machine to be removed should the same be broken,or should it be desired to remove it for any other reason, without disturbing the wires of said armature.

The invention consists in an improved armature of a dynamo and in the arrangements and combinations of parts thereof, substantially as will be hereinafterset forth, and finally embodied in the clauses of the claims.

Referring to the accompanying drawings, in which like letters represent corresponding parts in each of the several figures of the two sheets thereof, Figure 1, Sheet 1, is a side elevation, partlyin section, of my improved core and shaft; and Figs. 2, 3, 4, and 5, Sheet 2, are detail views, the last being a section through line :0, Fig. 4, of certain parts of said core, which will be hereinafter more fully described. In said drawings, B indicates a core of an armature of a dynamo; A, the driving-shaft, andOthe commutator. Said core is composed, in part-,of a shell or sleeve of metal, D, through which the driving-shaft A passes. Said shell or sleeve of metal is provided on the ends thereof with screw-threads F, adapted to engage corresponding threads in the clamping plates or heads G G., between which are arranged a series of circular plates or segments of soft iron, H, insulated from each other in the ordinary manner, and are held firmly in place by tightening the heads G G on the sleeve D,

- I by means of the screw-thread F, and by providing the outer periphery of the sleeve with accomplish this result, and also to secure said plates H firmly together, a key, I, is inserted through one head, as G, and all the plates H, bringing said key to a point fiush with the last plate of the series. The second head, as G, is then tightened upon the screw-thread of the opposite extremity of the sleeve until brought to a position to clamp said plates H, and at the same timethekey-seatof the head Gis brought in line with the key I, so that it may be thrust through said seat in the head G and brought to its final position, as shown in Fig. 1, thus securing the sleeve, clamping-plates, and series of intermediate plates firmly in their relative positions.

The central portion of the shaft A is larger than the end portions, thus allowing a screwthread to be turned on the ends of said central portion to receive a nut, J, as indicated in Fig. 1, said not J bearing against a drum or head, K, having a projecting flange, L, thus holding said drum or head in place, the said nut J and drum or head K being provided with a key-seat and adapted to be keyed to the central or larger portion of said shaft B, as at M, Fig. 1. The flange portion L of said drum or head K may be, and preferably is, provided with dowel-pinsN,orotherfasteningdevicesadapted to hold the clamping-plate G, thus securing all parts together, so that all will turn with said driving-shaft and be longitudinally adjustable thereon. I prefer to provide said clampingplate G with a groove or depression, It, and the flange L of the head K with a shoulder adapted to fit in said groove R, thus relieving the dowel-pins of the weight of the central portion of the core, as will be understood by reference to Fig. 1.

The key M may be secured from shaking out by inserting a setscrew, O, in the lock-nut J, thus locking both' the nut and key, as will be evident. The clamping-plates G G may be provided with spokes or parting-divisions P, Fig. 3, to divide the different segments of wires to be wound therearound, as in the ordinary Siemens type of armature.

The series of insulated plates H, Figs. 1 and 2, are suitably perforated and provided with a key-seat-,Q, to receive the key I and the sleeve D. By this construction it is evident that by loosening the setscrew O the key M may be taken out after removing the nut J, and. the

shaft.

shaft A may be removed without disturbing any of the core or the winding-wires of the armature.

Around the plates H and holding devices for retaining the same in position is disposed a body of wires, W, which extends over the periphery of the core and down at the sides or outer faces of the clamping-plates, as indicated in outline in Fig.1. The flanged heads K eX- tend longitudinally along the shaft A, passing through the body of wire, and at their outer ends receiving the means-such as the locknut J for securing the covered plates upon the shaft.

I am aware that dynamoelectric machines provided with insulated plates similar to those marked H herein have been arranged upon an insulating-sleeve keyed upon a driving-shaft and removable therefrom after the windingwires similar to those of the bodyindicated at W have been removed to allow access to the keys or means for holding the device to the In the improved device the plates and means for holding the same together and to the sleeve are removable from the shaft, together with the body of the winding-wires which inclose both said plates and the means for clamping said plates together and holding them to the sleeve.

Having thus fully described my invention, what I claim as newis- 1. In a dynamo, the combination of ashaft,

A, a sleeve, D, soft iron H, held upon said arranged outside of the said inclosing windingwires, substantially as and for the purposes set forth.

3. In combination, in the core of an arma- 5o ture of a dynamo, a sleeve, as D, clampingplates, as G, insulated plates,as H, and a drum or head, as K, provided with a flange, as L, and a body of winding-wires covering said plates, and means for holding the same together and uncovered means for holding said parts to the shaft, said parts being adapted to be movably secured to a driving-shaft, substantially as and for the purposes set forth.

4. In combination, in the core of an armature of a dynamo, a sleeve, as D, clampingplates, as G, drum, as K, flange, as L, insulated plates, as H, key-seat andkey, as I, for holding the plates H on the collar, lock-nut, as J, for preventing the core from working longitudinally on the shaft, and dowel-pins, as N, said parts being adapted to be movably secured to a drivingshaft, substantially as and for the purposes set forth.

5. In combination with the driving-shaft of 70 a dynamo, a sleeve, as D, insulated plates, as H, keyed thereto, clamping-plates, as G, provided with recesses or grooves, as R, head or drum K, provided with a flange, L, and shoulder adapted to fit said recess It, key M, locknut J, and dowel-pins N, all parts being movably arranged on a driving-shaft, substantially as and for the purposes set forth.

6. In combination, a sleeve provided at the ends thereof with threads, soft iron H, held upon said sleeve by means of clamping heads or plates G G, screwed upon said threads, winding-wires covering said soft iron and said clamping heads or plates, and holders J, substantially as described, for holding said covered sleeve, clamping heads or plates, and soft iron upon the shaft, substantially as set forth. In testimony that I claim the foregoing I have hereunto set my hand this 17th day of December, 1886.

EDXVARD N. BLISS. Witnesses:

WM. S. Conwnv, CHARLES H. PELL. 

